Kernel Bug Tracker – Bug 12041
2.6.28-rc4 mem_cgroup_charge_common panic
Last modified: 2008-12-03 15:28:47 UTC
Subject : 2.6.28-rc4 mem_cgroup_charge_common panic
Submitter : Badari Pulavarty <email@example.com>
Date : 2008-11-10 21:43
References : http://marc.info/?l=linux-kernel&m=122635343008147&w=4
Handled-By : KAMEZAWA Hiroyuki <firstname.lastname@example.org>
This entry is being used for tracking a regression from 2.6.27. Please don't
close it until the problem is fixed in the mainline.
It seems than memory cgroup's support for memory-hotplug is not good.
Can be avoided when memcg is not used (by config or boot option).
In my test box, x86-64 which doesn't have physical memory hotplug feature,
I can't reproduce the issue. Just online/offline memory doesn't show panic.
Some bugfix patches (from review) are in mmotm and I'm now looking for how to test.
Kame's patch to change init_section_page_cgroup() seems to have
fixed this problem. This is on top of mmotm.
Tests ran fine over the weekend (60+ hours).
Can you provide a pointer to the patch, please?
Never mind. :-)
Fixed by commit 33c5d3d64589c5d379db5a5615735f6d08438369 .
Hmm.. I see this problem again on 2.6.28-rc6. Did the fix ever made into mainline ?
Apparently it did, so it was not a fix. :-(
Fixed by: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=dc19f9db38295f811d9041bd89b113beccbd763a